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Penile implant surgeryView Articles
Penile metastasisView Articles

Volume 13, Number 2Case Review

Malignant Priapism Secondary to Metastatic Prostate Cancer: A Case Report and Review of Literature

Yu-Hsiang LinJerry J KimNed B SteinMohit Khera

Penile metastasis of cancers from other primary sites is a rare phenomenon that infrequently manifests as malignant priapism. We outline a case of an 84-year-old patient who presented with a 3-month history of painful priapism after radiation therapy for prostate adenocarcinoma. The patient underwent surgical penile exploration and cavernosal biopsy that revealed poorly differentiated cells suggestive of prostate cancer. Postoperative imaging demonstrated extensive regional and distal metastases. A review of the literature on penile metastases returned approximately 400 published cases, with priapism being the initial presentation in 20% to 50% of cases. Regardless of site of origin or subsequent management, most cases have shown very poor prognosis. [Rev Urol. 2011;13(2):90-94 doi: 10.3909/riu0508] © 2011 MedReviews®, LLC

Prostate cancerMalignant priapismPenile metastasis

Penile ossificationView Articles

Volume 19, Number 1Case Review

Penile Ossification: A Reconstructive Challenge

Nirmish SinglaArthi SatyanarayanAllen F Morey

Penile ossification is a rare condition that occurs most commonly in acquired cases of penile deformity. We report the case of a 43-year-old man with Peyronie disease who was incidentally found to have significant ossified tissue in his penile corpora during complex placement of an inflatable penile prosthesis (IPP). His clinical course was later complicated by impending distal extrusion of his IPP laterally, necessitating corporoplasty. Penile ossification remains a poorly understood, unusual entity that may pose a reconstructive challenge for urologists. We discuss evaluation and management of this condition, focusing on important considerations for preoperative counseling and intraoperative pearls. [Rev Urol. 2017;19(1):64-67 doi: 10.3909/riu0722] © 2017 MedReviews®, LLC

Peyronie’s diseasePenile ossificationInflatable penile prosthesisCorporoplasty

Penile prosthesesView Articles
Penile prosthesisView Articles
Penile rehabilitationView Articles

Volume 8, Number 4Review Articles

Penile Rehabilitation After Radical Prostatectomy: Important Therapy or Wishful Thinking?

Management Update

Jesse N MillsRandall B MeachamJoseph E Dall'EraHari K Koul

On the basis of data accumulated thus far, it is reasonable to discuss the implementation of a “penile rehabilitation” program with patients undergoing radical prostatectomy. Central to discussions of penile rehabilitation after radical prostatectomy is evidence demonstrating significant fibrotic changes in the corpus cavernosum that occur postoperatively. Several studies have been published evaluating the efficacy of various pro-erectogenic agents. The limited data regarding intracavernous injections and vacuum constriction devices suggest that an increased percentage of treated patients experienced a return of natural erections compared with patients who received no treatment. Longer, prospective, randomized, placebo-controlled studies will be needed to confirm the utility of these treatments. Data from contemporary studies evaluating the chronic use of oral phosphodiesterase type 5 inhibitors suggest a beneficial effect on endothelial cell function among men suffering from erectile dysfunction due to a variety of causes. Limited data suggest that this effect might be seen among post-prostatectomy patients, implying a possible role for these agents in enhancing the return of sexual function in such individuals. [Rev Urol. 2006;8(4):209-215]

Radical prostatectomyErectile dysfunctionPenile rehabilitationPDE-5 inhibitorsHypoxiaIntracorporeal injectionVacuum constriction device

Penile traction systemsView Articles

Volume 13, Number 3Review Articles

Peyronie’s Disease: Nonsurgical Therapy Options

Treatment Update

Franklin E KuehhasNenad DjakovicPeter WeiblTosev GeorgiRalf Herwig

Peyronie’s disease (PD) is a fibrous inelastic scar of the tunica albuginea, leading to penile deformity, penile curvature, shortening, narrowing, and painful erections that subsequently lead to painful or unsatisfying sexual intercourse. No consensus exists yet on the ideal management of PD. This fact is a result of our limited knowledge of its etiology and causative factors. The acute presentation of PD is treated conservatively, and surgical approachesare only attempted if severe curvature, narrowing, or indentation persists for more than 1 year; PD stability exists for at least 3 months; curvature impedes sexual intercourse; and severe penile shortening occurs. This review focuses on new developments for conservative treatment strategies for PD. [Rev Urol. 2011;13(3):139-146 doi: 10.3909/riu0528] © 2011 MedReviews®, LLC

Peyronie’s diseaseNonsurgical therapyOral medicationIntralesionaltherapyExtracorporeal shock wave therapyIontophoresisPenile traction systems

PenisView Articles
Pentosan polysulfateView Articles
Pentosan polysulfate sodiumView Articles

Volume 12, Number 3Review Articles

Forensic Dissection of a Clinical Trial: Lessons Learned in Understanding and Managing Interstitial Cystitis

Management Update

J Curtis Nickel

A pharmaceutical company—sponsored post-registration clinical trial designed to determine the most effective dose of pentosan polysulfate for the treatment of interstitial cystitis (IC) reported negative results. However, because of a priori trial design features, important posthoc analyses were able to answer many of the important clinical issues on the epidemiology, diagnosis, and treatment of IC that to date had remained unanswered. Seven published follow-up reports based on data and outcomes from the original study evaluated the clinical significance of a positive Potassium Sensitivity Test, confirmed the O’Leary-Sant Interstitial Cystitis Symptom Index as a valid and sensitive outcome measure, and determined that doses of pentosan polysulfate higher than the standard US Food and Drug Administration—approved dose of 300 mg/d did not increase efficacy although increased duration of therapy increases the chance of symptom amelioration. Further analyses determined that sexual dysfunction is an important parameter to assess in IC and that successful therapy can improve sexual functioning. Finally, the data showed that symptom severity, quality of life (QoL), and sleep function are interrelated. Consequently, symptom improvement with therapy correlates with improvement in both sleep function and QoL. This post hoc forensic dissection of a clinical trial initially undertaken for simple regulatory reasons has significantly improved our understanding and management of the enigmatic condition we call IC. [Rev Urol. 2010;12(2/3):e78-e85 doi: 10.3909/riu0445]

Interstitial cystitisPentosan polysulfate sodiumPotassium sensitivity test

Percutaneous accessView Articles
Percutaneous nephrolithotomyView Articles
Percutaneous nephrostolithotomyView Articles

Volume 16, Number 1Review Articles

Calyceal Diverticula: A Comprehensive Review

Disease State Review

Zeph OkekeNikhil WaingankarSamih HayekArthur D Smith

Calyceal diverticula are rare outpouchings of the upper collecting system that likely have a congenital origin. Stones can be found in up to 50% of calyceal diverticula, although, over the combined reported series, 96% of patients presented with stones. Diagnosis is best made by intravenous urography or computed tomography urogram. Shock wave lithotripsy (SWL) is an option for first-line therapy in patients with stone-bearing diverticula that have radiologically patent necks in mid- to upper-pole diverticula and small stone burdens. Stone-free rates are the lowest with SWL, although patients report being asymptomatic following therapy in up to 75% of cases with extended follow-up. Ureteroscopy (URS) is best suited for management of anteriorly located mid- to upper-pole diverticular stones. Drawbacks to URS include difficulty in identifying the ostium and low rate of obliteration. Percutaneous management is best used in posteriorly located mid- to lower-pole stones, and offers the ability to directly ablate the diverticulum. Percutaneous nephrolithotomy remains effective in the management of upper-pole diverticula, but carries the risk of pulmonary complications unless subcostal access strategies such as triangulation or renal displacement are used. Laparoscopic surgery provides definitive management, but should be reserved for cases with large stones in anteriorly located diverticula with thin overlying parenchyma, and cases that are refractory to other treatment. This article reviews the current theories on the pathogenesis of calyceal diverticula. The current classification is examined in addition to the current diagnostic methods. Here we summarize an extensive review of the literature on the outcomes of the different treatment approaches. [ Rev Urol. 2014;16(1):29-43 doi: 10.3909/riu0581] © 2014 MedReviews®, LLC

UreterorenoscopyCalyceal diverticulaPercutaneous nephrostolithotomyLaparoscopic surgeryShock wave lithotripsy

Percutaneous nephrostomyView Articles

Volume 20, Number 1Review Articles

Factors Associated With Postoperative Infection After Percutaneous Nephrolithotomy

Risk Factor Analysis

Win Shun LaiDean Assimos

Numerous studies have investigated risk factors for the development of postoperative infection in percutaneous nephrolithotomy (PCNL) patients. Herein, we describe our meta-analysis of the risk factors for the prediction of post-PCNL infectious complications. We searched electronic databases using a combination of the terms percutaneous nephrolithotomy, risk factors, infection, and sepsis. The primary outcome was post-PCNL infection as defined by fever greater than 38°C or sepsis as defined by the Sepsis Consensus Definition Committee. Risk factors for infection in each study were identified and included for analysis if present in at least two studies. We used quantitative effect sizes in odds ratio to assess each endpoint. After application of criteria, 24 studies were found, of which 12 were prospective and 12 were retrospective. Of the prospective studies, preoperative urine culture, renal pelvis culture, stone culture, number of access points, hydronephrosis, perioperative blood transfusion, and struvite stone composition were found to be significantly associated with postoperative infection. Of the 12 retrospective studies, preoperative urine culture, stone cultures, number of access points, blood transfusion, stone size, and staghorn formation were associated with infection. Preoperative urine culture, stone culture, number of access points, and need for blood transfusion were consistently found to be significant factors. This indicates that the presence of bacteria in the urine/stone preoperatively as well as the amount of trauma the kidney sustains during the procedure are major predictors of postoperative infection. [Rev Urol. 2018;20(1):7–11 doi: 10.3909/riu0778] © 2018 MedReviews®, LLC

Urinary tract infectionNephrolithiasisLithotripsyPercutaneous nephrostomy

Percutaneous surgeryView Articles
PercutaneousnephrolithotomyView Articles

Volume 13, Number 2Review Articles

Impact of Stone Removal on Renal Function: A Review

Treatment Review

Dean G AssimosKyle WoodPatrick W MufarrijTristan Keys

Stone removal can improve renal function by eradicating obstruction and, in certain cases, an underlying infection. Stone-removing procedures, however, may negatively impact functional integrity. Many things may impact the latter, including the procedures used, the methods of assessing function, the time when these assessments are made, the occurrence of complications, the baseline condition of the kidney, and patient-related factors. In the majority of cases, little significant functional impairment occurs. However, there are gaps in our knowledge of this subject, including the cumulative effects of multiple procedures violating the renal parenchyma and long-term functional outcomes. [Rev Urol. 2011;13(2):73-89 doi: 10.3909/riu0515] © 2011 MedReviews®, LLC

UreteroscopyKidney stonesShock wave lithotripsyRenal functionPercutaneousnephrolithotomy

Perineal urethrostomyView Articles

Volume 19, Number 1Case Review

Perineal Urethrostomy: Still Essential in the Armamentarium for Transurethral Surgery

Dimitri PapagiannopoulosLeslie A Deane

A 69-year-old morbidly obese man presented with hematuria caused by a large anterior wall bladder tumor. The mass was inaccessible for resection by standard means due to the patient’s obesity and phallic length. A perineal urethrostomy was required to enable complete resection. This age-old technique is revisited for the benefit of this generation’s urologists. [Rev Urol. 2017;19(1):72-75 doi: 10.3909/riu0742] © 2017 MedReviews®, LLC

Bladder tumorsTransurethral resectionPerineal urethrostomy

Perioperative blood lossView Articles

Volume 9, Number 3Meeting Reviews

Best of the 2007 AUA Annual Meeting

Meeting Review

Dean G AssimosDanil V MakarovEllen ShapiroAlan W PartinMichael B ChancellorJ Curtis NickelJacob RajferClaus G RoehrbornMichael K Brawer

Highlights from the 2007 Annual Meeting of the American Urological Association May 19-24, 2007 Anaheim, CA [Rev Urol. 2007;9(3):133-154]

Prostate cancerObesityBenign prostatic hyperplasiaAntibiotic prophylaxisNocturiaLower urinary tract symptomsBotulinum toxinProstate-specific antigenBiomarkersPCA3TestosteroneUrinary tract infectionsUrolithiasisLaser ablationEndourologyMale voiding dysfunctionLHRH antagonistsAntimuscarinic agentsCircumcisionRepeat biopsyHuman glandularkallikreinExpectant managementCRISP-3MSPMicrovesseldensityEndoglinSurvivinTelomeresInterleukin-8PDE-5 inhibitorsAcute urinaryretention5Alpha-reductase inhibitorsDoxazosinFinasterideTransurethral microwave thermotherapyTURPPerioperative blood lossMicrobialbiofilmsHIVStem cell injection

Perioperative outcomesView Articles

Volume 14, Number 1Review Articles

Radical Retropubic Prostatectomy: Comparison of the Open and Robotic Approaches for Treatment of Prostate Cancer

Treatment Review

Stacy LoebJeffrey J Tosoian

Radical prostatectomy represents the standard of care for surgical treatment of clinically localized prostate cancer. First described in 1904, the operation became widely performed only after advances in diagnostic and surgical techniques occurred later in the century. Over time, open retropubic radical prostatectomy (RRP) became the most common operation for prostate cancer, and excellent long-term survival outcomes have been reported. More recently, minimally invasive techniques such as the robotic-assisted laparoscopic radical prostatectomy (RALRP) were introduced. Despite a lack of prospectively collected, long-term data supporting its use, RALRP has overtaken RRP as the most frequently performed prostate cancer operation in the United States. This article uses currently available data to compare oncologic, functional, and quality-of-life outcomes associated with both the open and robotic approaches to radical prostatectomy. [ Rev Urol. 2012;14(1/2):20-27 doi:10.3909/riu0552] © 2012 MedReviews®, LLC

Prostate cancerRadical retropubic prostatectomyPerioperative outcomesRobotic-assisted

Peripheral nerve injuryView Articles

Volume 15, Number 4Review Articles

Anesthetic Challenges in Robotic-assisted Urologic Surgery

Management Review

Richard L HsuAlan D KayeRichard D Urman

Robotic-assisted surgery has evolved over the past two decades with constantly improving technology, assisting surgeons in multiple subspecialty disciplines. The surgical requirements of lithotomy and steep Trendelenburg positions, along with the creation of a pneumoperitoneum and limited access to the patient, all present anesthetic management challenges in urologic surgery. Patient positioning requirements can cause significant physiologic effects and may result in many complications. Good communication among team members and knowledge of the nuances of robotic surgery have the potential to improve patient outcomes, increase efficiency, and reduce surgical and anesthetic complications. [Rev Urol. 2013;15(4):178-184 doi: 10.3909/riu0589] © 2014 MedReviews®, LLC

Robotic surgeryUrologic surgeryAnesthesia complicationsPneumoperitoneumPeripheral nerve injuryPatient positioning

PermixonView Articles

Volume 5, Number 2Meeting Reviews

Advances in the Medical Treatment of Prostate Cancer, Bladder Cancer, Renal Cell Cancer, and Benign Prostatic Hyperplasia

Highlights from the XVIIth Congress of the European Association of Urology, Birmingham, UK

Claus G RoehrbornBob DjavanMesut RemziChristian Seitz

Prostate cancerBenign prostatic hyperplasiaBladder cancerLower urinary tract symptomsProstate-specific antigenRadical prostatectomyRadical nephrectomyNomogramsTamsulosinAlfuzosinFinasterideDutasterideBicalutamideBacille Calmette-GuerinPermixonRenal cell cancerTransrectal ultrasound-guided biopsyVirtual cystoscopy

Personalized medicineView Articles

Volume 19, Number 2Review Articles

Utilization of Individualized Prostate Cancer and Genomic Biomarkers for the Practicing Urologist

Management Update

Gregory C McMahonGordon A BrownThomas J Mueller

Prostate cancer encompasses a complex heterogeneous disease spectrum. Physicians and patients are faced with the ambiguity of who should be screened, biopsied, rebiopsied, treated, or provided with adjuvant therapy. Personalized outcomes and treatments are especially important given the varied nature of the disease, plethora of treatment options, risks of morbidity, and quality of life. Today’s practicing urologist has a multitude of tests from which to choose, creating the difficult task of appropriate use. This review focuses on two blood-, one urine-, and five genomic-based tests, which, when used in the appropriate clinical setting, can facilitate the patient-physician decision-making process. [Rev Urol. 2017;19(2):97–105 doi:10.3909/riu0730] © 2017 MedReviews®, LLC

Prostate cancerGenomic testsPersonalized medicine

Petit’s triangleView Articles

Volume 20, Number 2Case Review

Clinical Relevance of Petit’s Triangle: A Forgotten Landmark

Scott HalperinJulian SpectorDavid PennBarry Zisholtz

This rare case details a right-sided hydronephrotic kidney herniated through Petit’s triangle. Petit’s triangle is an anatomical landmark that is usually not clinically significant and only alluded to during multiple-choice examinations. This case describes the clinical ramification of this area of weakness and allows us to revisit and relearn the anatomy, and its relevance in clinical practice. [Rev Urol. 2018;20(2):112–114 doi: 10.3909/riu0796] © 2018 MedReviews®, LLC

HerniaPetit’s triangleHydronephrotic kidney

Peyronie’s diseaseView Articles
Pharmacologic therapyView Articles
PharmacologyView Articles
PharmacotherapyView Articles
Phenotypic biomarkersView Articles

Volume 22, Number 4Review Articles

Application of Artificial Intelligence/Machine Vision & Learning for the Development of a Live Single-cell Phenotypic Biomarker Test to Predict Prostate Cancer Tumor Aggressiveness

Original Research

David M. AlbalaGrannum R SantJonathan S VarsanikMichael S ManakMatthew J WhitfieldBrad J HoganWendell R SuCJ JiangAshok C Chander

To assess the usefulness and applications of machine vision (MV) and machine learning (ML) techniques that have been used to develop a single cell–based phenotypic (live and fixed biomarkers) platform that correlates with tumor biological aggressiveness and risk stratification, 100 fresh prostate samples were acquired, and areas of prostate cancer were determined by post-surgery pathology reports logged by an independent pathologist. The prostate samples were dissociated into single-cell suspensions in the presence of an extracellular matrix formulation. These samples were analyzed via live-cell microscopy. Dynamic and fixed phenotypic biomarkers per cell were quantified using objective MV software and ML algorithms. The predictive nature of the ML algorithms was developed in two stages. First, random forest (RF) algorithms were developed using 70% of the samples. The developed algorithms were then tested for their predictive performance using the blinded test dataset that contained 30% of the samples in the second stage. Based on the ROC (receiver operating characteristic) curve analysis, thresholds were set to maximize both sensitivity and specificity. We determined the sensitivity and specificity of the assay by comparing the algorithm-generated predictions with adverse pathologic features in the radical prostatectomy (RP) specimens. Using MV and ML algorithms, the biomarkers predictive of adverse pathology at RP were ranked and a prostate cancer patient risk stratification test was developed that distinguishes patients based on surgical adverse pathology features. The ability to identify and track large numbers of individual cells over the length of the microscopy experimental monitoring cycles, in an automated way, created a large biomarker dataset of primary biomarkers. This biomarker dataset was then interrogated with ML algorithms used to correlate with post-surgical adverse pathology findings. Algorithms were generated that predicted adverse pathology with >0.85 sensitivity and specificity and an AUC (area under the curve) of >0.85. Phenotypic biomarkers provide cellular and molecular details that are informative for predicting post-surgical adverse pathologies when considering tumor biopsy samples. Artificial intelligence ML-based approaches for cancer risk stratification are emerging as important and powerful tools to compliment current measures of risk stratification. These techniques have capabilities to address tumor heterogeneity and the molecular complexity of prostate cancer. Specifically, the phenotypic test is a novel example of leveraging biomarkers and advances in MV and ML for developing a powerful prognostic and risk-stratification tool for prostate cancer patients. [Rev Urol. 2020;22(4):159–167] © 2021 MedReviews®, LLC

Prostate cancerArtificial intelligencePhenotypic biomarkersMachine visionMachine learning

PhenotypingView Articles
PhosphodiesteraseView Articles